A kind of electrochemical sensor material for detecting urea and preparation method thereof
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An electrochemical and sensor technology, which is applied in the field of material chemistry to achieve good electrocatalytic activity and promote electrochemical reactions.
Active Publication Date: 2019-02-26
NINGBO UNIV
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There are few reports on the electrochemical detection of urea
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Embodiment 1
[0022] To a 25 mL polytetrafluoroethylene liner was added potassium 5-nitroorotate monohydrate (0.5 mmol, 0.1286 g), 2,2'-bipyridine (0.5 mmol, 0.0781 g), and Co(Ac) 2 4H 2 O (0.5mmol, 0.1245g), add 15mL of distilled water, stir to obtain a reaction mixture; seal the polytetrafluoroethylene lining, put it in a stainless steel reaction kettle, put the stainless steel reaction kettle in an oven, and heat at 100°C for 72h , then naturally cooled to room temperature, opened the reaction kettle to obtain brownish-yellow block crystals; took out the crystals, and air-dried naturally to obtain the cobalt complex.
Embodiment 2
[0024] To a 25 mL polytetrafluoroethylene liner was added potassium 5-nitroorotate monohydrate (0.1 mmol, 0.0257 g), 2,2'-bipyridine (0.1 mmol, 0.0156 g), and Co(Ac) 2 4H 2 O (0.15mmol, 0.0374g), add distilled water 8mL, stir to obtain a reaction mixture; seal the polytetrafluoroethylene lining, put it in a stainless steel reaction kettle, put the stainless steel reaction kettle in an oven, and heat the reaction at 125°C for 48h , then naturally cooled to room temperature, opened the reaction kettle to obtain brownish-yellow block crystals; took out the crystals, and air-dried naturally to obtain the cobalt complex.
Embodiment 3
[0026] To a 25 mL polytetrafluoroethylene liner was added potassium 5-nitroorotate monohydrate (0.2 mmol, 0.0514 g), 2,2'-bipyridine (0.2 mmol, 0.0216 g), and Co(Ac) 2 4H 2 O (0.25mmol, 0.0623g), add distilled water 10mL, stir to obtain a reaction mixture; seal the polytetrafluoroethylene lining, put it in a stainless steel reaction kettle, put the stainless steel reaction kettle in an oven, and heat the reaction at 115°C for 60h , then naturally cooled to room temperature, opened the reaction kettle to obtain brownish-yellow block crystals; took out the crystals, and air-dried naturally to obtain the cobalt complex.
[0027] The brown-yellow crystals obtained in Examples 1-3 are subjected to structural testing with single crystal X-rays, and the results show that the brown-yellow crystals are cobalt coordination compounds, and its structural units are as follows: figure 1 As shown, its molecular formula is CoC 15 h 15 N 5 o 9 , the structural unit is [Co(C 5 HN 3 o 6 ...
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Abstract
The invention discloses an electrochemical sensor material for detecting urea and a preparation method of the electrochemical sensor material. The electrochemical sensor material is a cobalt coordination compound of a definite space structure, the chemical formula of the electrochemical sensor material is CoC15H15N5O9, the structural unit of the electrochemical sensor material is [Co(C5HN3O6)(C10H8N2)(H2O)2]*H2O, the crystal system of the electrochemical sensor material is a triclinic system, a space group of the electrochemical sensor material is P-1, the lattice parameters of the electrochemical sensor material are that a=7.6346A', b=10.7886 A', c=11.6228 A', alpha=90.800 degree, beta=102.747 degrees and gamma=91.518 degrees, the cobalt ions are of octahedron geometrical configuration of hexa-coordinate, the preparation method of the cobalt coordination compound comprises the following steps: mixing 2,2'-dipyridyl with conjugated large pi bonds, 5-nitro orotic acid mono potassium and cobalt ions with electro-catalytic activity according to a certain ratio, and performing chemical reaction, thereby obtaining the cobalt coordination compound. The preparation method is simple to operate, low in cost and applicable to on-scale production. The cobalt coordination compound prepared by using the method has good electro-catalytic activity, and has potential application prospects as an electrochemical sensation material.
Description
technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to an electrochemical sensor material for detecting urea and a preparation method thereof. Background technique [0002] Urea, also known as carbamide, is one of the simplest organic compounds composed of C, N, O, and H. Also known as urea, the diamide of carbonic acid, the molecular formula is H 2 NCONH 2 , is a white crystal with a molecular mass of 60. As a neutral fertilizer, urea is currently the nitrogen fertilizer with the highest nitrogen content. Urea is suitable for a variety of soils and plants. It is easy to store, easy to use, and has little damage to the soil. It is a chemical nitrogen fertilizer that is currently used in large quantities. In industry, ammonia and carbon dioxide are used to synthesize urea under certain conditions. [0003] Organisms synthesize urea from chemicals such as carbon dioxide, water, aspartic acid, and ammonia. The metabo...
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